Citação norma APA
Murphy, R. (1998). Essential english grammar: A self-study reference and practice book for elementary students of english; with answers (2nd ed.). CUP.
Citação norma Chicago
Murphy, Raymond. Essential English Grammar: A Self-study Reference and Practice Book for Elementary Students of English; with Answers. 2nd ed. Cambridge: CUP, 1998.
Citação norma MLA
Murphy, Raymond. Essential English Grammar: A Self-study Reference and Practice Book for Elementary Students of English; with Answers. 2nd ed. CUP, 1998.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.