Cita APA (7a ed.)

Gega, P. C., Gega, P. C. S. i. e. e., & Gega, P. C. C. a. e. i. e. s. s. (1994). How to teach elementary school science (2nd ed.). Macmillan.

Cita Chicago Style (17a ed.)

Gega, Peter C., Peter C. Science in elementary education Gega, y Peter C. Concepts and experiences in elementary school science Gega. How to Teach Elementary School Science. 2nd ed. New York: Macmillan, 1994.

Cita MLA (9a ed.)

Gega, Peter C., et al. How to Teach Elementary School Science. 2nd ed. Macmillan, 1994.