APA (7th ed.) Zitazioa
McKenzie, S. C. (1980). Aging and old age. Scott, Foresman.
Chicago Style (17th ed.) Zitazioa
McKenzie, Sheila C. Aging and Old Age. Glenview, Ill.: Scott, Foresman, 1980.
MLA (9th ed.) Zitazioa
McKenzie, Sheila C. Aging and Old Age. Scott, Foresman, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.