Dyfyniad APA

Liebowitz, D. G. (1990). Practical vocabulary builder Blackline masters. USA: National textbook Company.

Dyfyniad Arddull Chicago

Liebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.

Dyfyniad MLA

Liebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.

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