Cita APA (7a ed.)

Douglas, L. V. (1965). Teaching business subjects. Prentice-Hall, Inc.

Cita Chicago Style (17a ed.)

Douglas, Lloyd V. Teaching Business Subjects. Prentice-Hall, Inc, 1965.

Cita MLA (8a ed.)

Douglas, Lloyd V. Teaching Business Subjects. Prentice-Hall, Inc, 1965.