Styl cytowania APA

Engs, R., & Engs, R. C. (2005). The eugenics movement: An encyclopedia. Greenwood Press.

Styl cytowania Chicago

Engs, Ruth, i Ruth C. Engs. The Eugenics Movement: An Encyclopedia. Westport, Conn. [u.a.]: Greenwood Press, 2005.

Styl cytowania MLA

Engs, Ruth, i Ruth C. Engs. The Eugenics Movement: An Encyclopedia. Greenwood Press, 2005.