Gaya APA

David, S. (2000). Vital Energy: The 7 keys to Invigorate Body, Mind & Soul . Buku Kedkteran EGC: Elseiver Mosby.

Gaya MLA

David, S.. Vital Energy: The 7 keys to Invigorate Body, Mind & Soul. Buku Kedkteran EGC: Elseiver Mosby, 2000. Text.