APA

Knoeppel C. E., Minor A. J. & Lewis E. S. E. (1933). Profit engineering, applied economics in making business profitable. : McGraw-Hill book company, inc.

Chicago

Knoeppel Charles Edward, Minor Arthur J and Lewis Elias St Elmo. 1933. Profit engineering, applied economics in making business profitable. : McGraw-Hill book company, inc.

Harvard

Knoeppel C. E., Minor A. J. and Lewis E. S. E. (1933). Profit engineering, applied economics in making business profitable. : McGraw-Hill book company, inc.

MLA

Knoeppel Charles Edward, Minor Arthur J and Lewis Elias St Elmo. Profit engineering, applied economics in making business profitable. : McGraw-Hill book company, inc. 1933.