APA (7th ed.) Citation

Wellisch, H. (1970). The Universal decimal classification: A programmed instruction course. School of Library and Information Services, University of Maryland.

Chicago Style (17th ed.) Citation

Wellisch, Hanan. The Universal Decimal Classification: A Programmed Instruction Course. [College Park, Md.]: School of Library and Information Services, University of Maryland, 1970.

MLA (9th ed.) Citation

Wellisch, Hanan. The Universal Decimal Classification: A Programmed Instruction Course. School of Library and Information Services, University of Maryland, 1970.