APA (7e ed.) Bronvermelding

Lyon, W., & Duke, B. J. (1981). Introduction to human services. Reston Pub. Co.

Chicago (17e ed.) Bronvermelding

Lyon, William, en Bill J. Duke. Introduction to Human Services. Reston, Va: Reston Pub. Co, 1981.

MLA (9e ed.) Bronvermelding

Lyon, William, en Bill J. Duke. Introduction to Human Services. Reston Pub. Co, 1981.