APA (7. basım) Alıntı

Guerra, P. M. (1969). Problem solving approach in health education. s.n.].

Chicago Style (17. basım) Atıf

Guerra, Pacita M. Problem Solving Approach in Health Education. [Quezon City: s.n.], 1969.

MLA (9th ed.) Atıf

Guerra, Pacita M. Problem Solving Approach in Health Education. s.n.], 1969.