奥姆. (2009). 地球·火星: Let's explore Earth, Let's explore Mars. 四川少年儿童出版社.
Cita Chicago Style (17a ed.)奥姆. 地球·火星: Let's Explore Earth, Let's Explore Mars. 四川少年儿童出版社, 2009.
Cita MLA (8a ed.)奥姆. 地球·火星: Let's Explore Earth, Let's Explore Mars. 四川少年儿童出版社, 2009.
Precaución: Estas citas no son 100% exactas.