APA aipamena

Oskamp, S., & Spacapan, S. (1992). Helping ang being helped: Naturalistic studies. Sage.

Chicago Style aipamena

Oskamp, Stuart, and Shirlynn Spacapan. Helping Ang Being Helped: Naturalistic Studies. Newbury Park, Calif: Sage, 1992.

MLA aipamena

Oskamp, Stuart, and Shirlynn Spacapan. Helping Ang Being Helped: Naturalistic Studies. Sage, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.