Gaya APA

Howard, F, M. (2009). Textbook Of Geriatric Medicine And Gerontology (Edisi 7th.ed.). Philadelphia: Saunder Company.

Gaya MLA

Howard, Fillit, M.. "Textbook Of Geriatric Medicine And Gerontology". Edisi 7th.ed. Philadelphia: Saunder Company, 2009. Text.