Dyfyniad APA

Barbara Robinson. (1998). Focus: Interactive grammar for students of ESL. Cambridge, UK: Cambridge Univ. Press.

Dyfyniad Arddull Chicago

Barbara Robinson. Focus: Interactive Grammar for Students of ESL. Cambridge, UK: Cambridge Univ. Press, 1998.

Dyfyniad MLA

Barbara Robinson. Focus: Interactive Grammar for Students of ESL. Cambridge, UK: Cambridge Univ. Press, 1998.

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