Cita APA (7th ed.)

Schoell, W. F. (1993). Introduction to business: Opening doors. Allyn and Bacon.

Cita Chicago (17th ed.)

Schoell, William F. Introduction to Business: Opening Doors. Boston: Allyn and Bacon, 1993.

Cita MLA (9th ed.)

Schoell, William F. Introduction to Business: Opening Doors. Allyn and Bacon, 1993.