APA-viite (7. p.)

Langan, J. (2006). English skills (8th ed.). McGraw-Hill.

Chicago-viite (17. p.)

Langan, John. English Skills. 8th ed. Boston: McGraw-Hill, 2006.

MLA-viite (9. p.)

Langan, John. English Skills. 8th ed. McGraw-Hill, 2006.