Gaya APA

Nicoll, P, G, R, N, B, C, L, H. (2003). Perspectives on nursing theory (4). Philadelphia: Lippincott Williams and Wilkins.

Gaya MLA

Nicoll, Pamela, G., Reed,, Nelma., B., Crawford,, Leslie, H.. "Perspectives on nursing theory". 4 Philadelphia: Lippincott Williams and Wilkins, 2003. Text.