Cita APA

Mortimer, M. (1998). Learn Dewey decimal classification (21st edition.). DocMatrix.

Citación estilo Chicago

Mortimer, Mary. Learn Dewey Decimal Classification. 21st edition. Canberra: DocMatrix, 1998.

Cita MLA

Mortimer, Mary. Learn Dewey Decimal Classification. 21st edition. DocMatrix, 1998.

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