Dyfyniad APA

Warshawsky, D., & Byrd, D. R. H. (1994). Spectum: A communicative course in English. Englewood Cliffs, NJ: Prentice Hall Regents.

Dyfyniad Arddull Chicago

Warshawsky, Diane., và Donald R. H. Byrd. Spectum: A Communicative Course in English. Englewood Cliffs, NJ: Prentice Hall Regents, 1994.

Dyfyniad MLA

Warshawsky, Diane., và Donald R. H. Byrd. Spectum: A Communicative Course in English. Englewood Cliffs, NJ: Prentice Hall Regents, 1994.

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