Cita APA

Callahan, P. S. 1. -., & Callahan, P. S. 1. -. (1971). Insects and how they function. Nueva York: Holiday House.

Citación estilo Chicago

Callahan, Philip S. 1923 -, y Philip S. 1923 - Callahan. Insects and How They Function. Nueva York: Holiday House, 1971.

Cita MLA

Callahan, Philip S. 1923 -, y Philip S. 1923 - Callahan. Insects and How They Function. Nueva York: Holiday House, 1971.