APA (7th ed.) Zitazioa

Keith-Lucas, A. (1994). Giving and taking help (Rev. ed.). NAA.

Chicago Style (17th ed.) Zitazioa

Keith-Lucas, Alan. Giving and Taking Help. Rev. ed. Pennsylvania: NAA, 1994.

MLA (9th ed.) Zitazioa

Keith-Lucas, Alan. Giving and Taking Help. Rev. ed. NAA, 1994.