Cita APA (7a ed.)

Aitken, R. (1992). Teaching tenses: Ideas for presenting and practising tenses in english. [s.n].

Cita Chicago Style (17a ed.)

Aitken, Rosemary. Teaching Tenses: Ideas for Presenting and Practising Tenses in English. NelSon, U.K: [s.n], 1992.

Cita MLA (9a ed.)

Aitken, Rosemary. Teaching Tenses: Ideas for Presenting and Practising Tenses in English. [s.n], 1992.