Citação norma APA

MURPHY, R. (1990). Essential grammar in use: A self-study reference andpractice book for elementary students of english. Cambridge University Press.

Citação norma Chicago

MURPHY, Raymond. Essential Grammar in Use: A Self-study Reference Andpractice Book for Elementary Students of English. Cambridge: Cambridge University Press, 1990.

Citação norma MLA

MURPHY, Raymond. Essential Grammar in Use: A Self-study Reference Andpractice Book for Elementary Students of English. Cambridge University Press, 1990.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.