Dyfyniad APA

Sullivan, N. (2015). Essential grammar for today's writers, students, and teachers. Routledge, Taylor & Francis Group.

Dyfyniad Arddull Chicago

Sullivan, Nancy. Essential Grammar for Today's Writers, Students, and Teachers. New York: Routledge, Taylor & Francis Group, 2015.

Dyfyniad MLA

Sullivan, Nancy. Essential Grammar for Today's Writers, Students, and Teachers. Routledge, Taylor & Francis Group, 2015.

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