APA aipamena

Corey, M. S. C. a. G. Becoming a helper. Brooks/Cole.

Chicago Style aipamena

Corey, Marianne Schneider Corey and Gerald. Becoming a Helper. Brooks/Cole.

MLA aipamena

Corey, Marianne Schneider Corey and Gerald. Becoming a Helper. Brooks/Cole.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.