Citazione Stile APA (7a Edizione)
Murphy, R. (1998). Essential english grammar: A self-study reference and practice book for elementary students of english; with answers (2nd ed.). CUP.
Citazione stile Chigago Style (17a edizione)
Murphy, Raymond. Essential English Grammar: A Self-study Reference and Practice Book for Elementary Students of English; with Answers. 2nd ed. Cambridge: CUP, 1998.
Citatione MLA (9a ed.)
Murphy, Raymond. Essential English Grammar: A Self-study Reference and Practice Book for Elementary Students of English; with Answers. 2nd ed. CUP, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.