Lim, M.;                     Jeong, K.S.;                     Oh, S.-S.;                     Koh, S.-B.;                     Chang, S.-J.;                     Ahn, Y.-S.    
        Effects of Occupational and Leisure-Time Physical Activities on Insomnia in Korean Firefighters. Int. J. Environ. Res. Public Health 2020, 17, 5397.
    https://doi.org/10.3390/ijerph17155397
    AMA Style
    
                                Lim M,                                 Jeong KS,                                 Oh S-S,                                 Koh S-B,                                 Chang S-J,                                 Ahn Y-S.        
                Effects of Occupational and Leisure-Time Physical Activities on Insomnia in Korean Firefighters. International Journal of Environmental Research and Public Health. 2020; 17(15):5397.
        https://doi.org/10.3390/ijerph17155397
    
    Chicago/Turabian Style
    
                                Lim, Myeongseob,                                 Kyoung Sook Jeong,                                 Sung-Soo Oh,                                 Sang-Baek Koh,                                 Sei-Jin Chang,                                 and Yeon-Soon Ahn.        
                2020. "Effects of Occupational and Leisure-Time Physical Activities on Insomnia in Korean Firefighters" International Journal of Environmental Research and Public Health 17, no. 15: 5397.
        https://doi.org/10.3390/ijerph17155397
    
    APA Style
    
                                Lim, M.,                                 Jeong, K. S.,                                 Oh, S.-S.,                                 Koh, S.-B.,                                 Chang, S.-J.,                                 & Ahn, Y.-S.        
        
        (2020). Effects of Occupational and Leisure-Time Physical Activities on Insomnia in Korean Firefighters. International Journal of Environmental Research and Public Health, 17(15), 5397.
        https://doi.org/10.3390/ijerph17155397