Gaya APA

Trowbridge, L, W., Bybee, R, W. (1981). Becoming a Secondary School Science Teacher Fourth Edition (Ed. 4). Ohio: Merrill Publishing Company.

Gaya MLA

Trowbridge, Leslie, W.., Bybee, Rodger, W.. "Becoming a Secondary School Science Teacher Fourth Edition". Ed. 4 Ohio: Merrill Publishing Company, 1981. Text.