APA (7th ed.) Citation

ProQuest (Firm). (2017). GMAT Official Guide 2018: Book + Online. John Wiley and Sons, Inc. : Wiley.

Chicago Style (17th ed.) Citation

ProQuest (Firm). GMAT Official Guide 2018: Book + Online. Hoboken, New Jersey: John Wiley and Sons, Inc. : Wiley, 2017.

MLA (9th ed.) Citation

ProQuest (Firm). GMAT Official Guide 2018: Book + Online. John Wiley and Sons, Inc. : Wiley, 2017.

Warning: These citations may not always be 100% accurate.