Gaya APA

Rodgers, B, L., Knafl, K, A. (1993). Concept development in Nursing : Foundations, Techniques and Applications . Philadelphia: W.B Saunders Company.

Gaya MLA

Rodgers, Beth, L., Knafl, Kathleen, A.. "Concept development in Nursing : Foundations, Techniques and Applications". Philadelphia: W.B Saunders Company, 1993. Text.