Cita APA (7th ed.)

Murphy, R. (1992). Essential English grammar: A self- study reference and practice book for elementary students of English (Second edition.). Cambridge University Press ; Foundation Books.

Cita Chicago (17th ed.)

Murphy, Raymond. Essential English Grammar: A Self- Study Reference and Practice Book for Elementary Students of English. Second edition. Cambridge : New Delhi: Cambridge University Press ; Foundation Books, 1992.

Cita MLA (8th ed.)

Murphy, Raymond. Essential English Grammar: A Self- Study Reference and Practice Book for Elementary Students of English. Second edition. Cambridge University Press ; Foundation Books, 1992.