Mabry, R., Ulbrich, H., Kelly, E. Instructor's Manual and Test Bank to Accompany Introduction to Economic Principles. New York: McGraw-Hill Book, 1989 232 с. : със сх. 0-07-044798-5.
Mabry, R., Ulbrich, H., Kelly, E. Instructor's Manual and Test Bank to Accompany Introduction to Economic Principles. New York: McGraw-Hill Book, 1989 232 с. : със сх. 0-07-044798-5.
Mabry, R., Ulbrich, H., Kelly, E. (1989) Instructor's Manual and Test Bank to Accompany Introduction to Economic Principles, New York: McGraw-Hill Book 232 с. : със сх. 0-07-044798-5.
Mabry, R., Ulbrich, H., & Kelly, E. (1989). Instructor's Manual and Test Bank to Accompany Introduction to Economic Principles. New York: McGraw-Hill Book, 232 с. : със сх.
Mabry R, Ulbrich H, Kelly E. Instructor's Manual and Test Bank to Accompany Introduction to Economic Principles. New York: McGraw-Hill Book; 1989. p. 232 с. : със сх. ISBN: 0-07-044798-5.