Cita APA (7a ed.)

Heaton, J. B. (1973). Using prepositions and particles: Workbook one. Longman.

Cita Chicago Style (17a ed.)

Heaton, J. B. Using Prepositions and Particles: Workbook One. Buenos Aires: Longman, 1973.

Cita MLA (8a ed.)

Heaton, J. B. Using Prepositions and Particles: Workbook One. Longman, 1973.