APA-viite

Kaprio, J., Alen, M. J., Liukkonen, J., Aaltonen, S., Leskinen, T., Kujala, U., & Alen, M. (2012). Motives for and Barriers to Physical Activity in Twin Pairs Discordant for Leisure Time Physical Activity for 30 Years. International journal of sports medicine, 33(2), p. 157.

Chicago-tyylinen lähdeviittaus

Kaprio, Jaakko, Markku Juhani Alen, Jarmo Liukkonen, Sari Aaltonen, Tuija Leskinen, Urho Kujala, and Markku Alen. "Motives for and Barriers to Physical Activity in Twin Pairs Discordant for Leisure Time Physical Activity for 30 Years." International Journal of Sports Medicine 33, no. 2 (2012): 157.

MLA-viite

Kaprio, Jaakko, et al. "Motives for and Barriers to Physical Activity in Twin Pairs Discordant for Leisure Time Physical Activity for 30 Years." International Journal of Sports Medicine 33.2 (2012): 157.

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