Dyfyniad APA

Walker, R. (2016). Tourism 1 (Student's Book). Oxford University press.

Dyfyniad Arddull Chicago

Walker, Robin. Tourism 1 (Student's Book). Oxford University press, 2016.

Dyfyniad MLA

Walker, Robin. Tourism 1 (Student's Book). Oxford University press, 2016.

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