APA (7th ed.) Citation

Clausen, J. (1966). Ability structure and subgroups in mental retardation. Spartan Books.

Chicago Style (17th ed.) Citation

Clausen, Johannes. Ability Structure and Subgroups in Mental Retardation. Washington: Spartan Books, 1966.

MLA (9th ed.) Citation

Clausen, Johannes. Ability Structure and Subgroups in Mental Retardation. Spartan Books, 1966.

Warning: These citations may not always be 100% accurate.