APA citiranje

Helle, S., Lummaa, V., & Jokela, J. (2007). Marrying women 15 years younger maximized men's evolutionary fitness in historical Sami. The Royal Society.

Citação norma Chicago

Helle, Samuli, Virpi Lummaa, and Jukka Jokela. Marrying Women 15 Years Younger Maximized Men's Evolutionary Fitness in Historical Sami. The Royal Society, 2007.

MLA citiranje

Helle, Samuli, Virpi Lummaa, and Jukka Jokela. Marrying Women 15 Years Younger Maximized Men's Evolutionary Fitness in Historical Sami. The Royal Society, 2007.