马尔萨斯. (2007). 人口原理: Essay on the principle of population. 陕西人民出版社.
Dyfyniad Arddull Chicago马尔萨斯. 人口原理: Essay on the Principle of Population. 陕西人民出版社, 2007.
Dyfyniad MLA马尔萨斯. 人口原理: Essay on the Principle of Population. 陕西人民出版社, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.