Van Tol, A. (2010). Orca echoes resource guide. Orca Book Publishers.
芝加哥风格引文Van Tol, Alex. Orca Echoes Resource Guide. [Victoria, British Columbia]: Orca Book Publishers, 2010.
MLA引文Van Tol, Alex. Orca Echoes Resource Guide. Orca Book Publishers, 2010.
警告：这些引文格式不一定是100％准确.