Roldan, C. A. (2005). The ultimate echo guide. Lippincott Williams & Wilkins.
Chicago Style (17th ed.) CitationRoldan, Carlos A. The Ultimate Echo Guide. Philadelphia: Lippincott Williams & Wilkins, 2005.
MLA引文Roldan, Carlos A. The Ultimate Echo Guide. Lippincott Williams & Wilkins, 2005.
警告:這些引文格式不一定是100%准確.