APA (7. basım) Alıntı

Penfield, W. (1967). The difficult art of giving: The epic of Alan Gregg. Little Brown.

Chicago Style (17. basım) Atıf

Penfield, Wilder. The Difficult Art of Giving: The Epic of Alan Gregg. Boston: Little Brown, 1967.

MLA (9th ed.) Atıf

Penfield, Wilder. The Difficult Art of Giving: The Epic of Alan Gregg. Little Brown, 1967.