APA (7e ed.) Bronvermelding

DREW, C. J., LOGAN, D. R., & HARDMAN, M. L. (1986). Mental retardation: A life cycle approach .--Ed.3. A Bell and Hawell.

Chicago (17e ed.) Bronvermelding

DREW, Clifford J., Donald R. LOGAN, en Michael L. HARDMAN. Mental Retardation: A Life Cycle Approach .--Ed.3. Columbus: A Bell and Hawell, 1986.

MLA (9e ed.) Bronvermelding

DREW, Clifford J., et al. Mental Retardation: A Life Cycle Approach .--Ed.3. A Bell and Hawell, 1986.