龚勋. (2012). 感恩朋友: Real friendship will be treasured by us for ever. 汕头大学出版社.
Chicagoスタイル(17版)引用形式龚勋. 感恩朋友: Real Friendship Will Be Treasured by Us for Ever. 汕头大学出版社, 2012.
MLA(8版)引用形式龚勋. 感恩朋友: Real Friendship Will Be Treasured by Us for Ever. 汕头大学出版社, 2012.
警告: この引用は必ずしも正確ではありません.