APA (7e ed.) Bronvermelding

Shenkel, W. M. (1980). Modern real estate principles (Revised edition.). Business Publications, Inc.

Chicago (17e ed.) Bronvermelding

Shenkel, William M. Modern Real Estate Principles. Revised edition. Dallas, Texas: Business Publications, Inc, 1980.

MLA (9e ed.) Bronvermelding

Shenkel, William M. Modern Real Estate Principles. Revised edition. Business Publications, Inc, 1980.