APA (7th ed.) Zitazioa

Keith-Lucas, A. (1972). Giving and taking help. University of North Carolina.

Chicago Style (17th ed.) Zitazioa

Keith-Lucas, Alan. Giving and Taking Help. Chapel hill: University of North Carolina, 1972.

MLA (9th ed.) Zitazioa

Keith-Lucas, Alan. Giving and Taking Help. University of North Carolina, 1972.