APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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