Gaya APA

Trowbridge, L, W., Bybee, R, W. (1990). Becoming a secondary school science teacher (5th ed.). Columbus: Merrill.

Gaya MLA

Trowbridge, Leslie, W.., Bybee, Rodger, W.. "Becoming a secondary school science teacher". 5th ed. Columbus: Merrill, 1990. Text.