APA (7e ed.) Bronvermelding

Howard-Williams, D., Tomalin, M., & Watcyn-Jones, P. Instant lessons 1. Elementary.

Chicago (17e ed.) Bronvermelding

Howard-Williams, Deirdre, Mary Tomalin, en Peter Watcyn-Jones. Instant Lessons 1. Elementary.

MLA (8e ed.) Bronvermelding

Howard-Williams, Deirdre, et al. Instant Lessons 1. Elementary.