APA

Oh J. K., Seward J. B. & Tajik A. J. (2007). The echo manual. Philadelphia: Lippincott Williams & Wilkins.

Chicago

Oh Jae K, Seward James B and Tajik A Jamil. 2007. The echo manual. Philadelphia: Lippincott Williams & Wilkins.

Harvard

Oh J. K., Seward J. B. and Tajik A. J. (2007). The echo manual. Philadelphia: Lippincott Williams & Wilkins.

MLA

Oh Jae K, Seward James B and Tajik A Jamil. The echo manual. Philadelphia: Lippincott Williams & Wilkins. 2007.