APA (7th ed.) Citation

(1986). Who's that knocking at my door? Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Who's That Knocking at My Door? Oxford [u.a.]: Oxford Univ. Press, 1986.

MLA (9th ed.) Citation

Who's That Knocking at My Door? Oxford Univ. Press, 1986.

Warning: These citations may not always be 100% accurate.