Dyfyniad APA

Kipfer, B. A. (1993). Roget's 21st century thesaurus. New York: The Philip Lief Group.

Dyfyniad Arddull Chicago

Kipfer, Barbara Ann. Roget's 21st Century Thesaurus. New York: The Philip Lief Group, 1993.

Dyfyniad MLA

Kipfer, Barbara Ann. Roget's 21st Century Thesaurus. New York: The Philip Lief Group, 1993.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.