Cohen, David
Precalculus: a problem-oriented approach
Thomson Brooks/Cole, 2005
 Buku Teks
Problem-oriented systems of patient care
National League for Nursing , 1974
 Buku Teks
Yao and Artusio's anesthesiology: problem-oriented patient management
Fun-Sun F. Yao, editor
Lippincott Williams & Wilkins, 2008
 Buku Teks
Spanogle, John A.
International sales law a problem oriented coursebook
St. Paul Minn, 2000
 Buku Teks
Primate ecology : problem-oriented field studies
edited by Robert W. Sussman
Alfred A. Knopf, 1979
 Buku Teks