SWAN, Michael a WALTER, Catherine. The New Cambridge English Course: audiokazeta 1. Cambridge: Cambridge University Press, 1990. ISBN 0521375029.
APA CSE CSE NY ČSN ISO 690:2022 (číslování) ČSN ISO 690:2022 - autor, datum Harvard Chicago (16th edition) IEEE ISO 690 MLA (7th edition) Turabian (7th edition)