Gaya APA

Cavanaugh, J, C., Blanchard-Fields, F. (). E-book Adult Development and Aging (6th ed.). USA: Wadsworth Cengage Learning.

Gaya MLA

Cavanaugh, John, C.., Blanchard-Fields, Fredda. "E-book Adult Development and Aging". 6th ed. USA: Wadsworth Cengage Learning, . Text.