APA-referens (7:e uppl.)

Beltran, T. A. (1987). The use of games in high school biology. s.n.

Chicago-referens (17:e uppl.)

Beltran, Teresita Arce. The Use of Games in High School Biology. s.l: s.n, 1987.

MLA-referens (9:e uppl.)

Beltran, Teresita Arce. The Use of Games in High School Biology. s.n, 1987.