APA-ийн эшлэл(7 дахь хэвлэлт)

KEYFITZ, N. (1968). Introduction to the mathematics of population; 2nd ed. Addison-Wesley.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

KEYFITZ, Nathan. Introduction to the Mathematics of Population; 2nd Ed. Reading, Mass: Addison-Wesley, 1968.

MLA -ийн эшлэл (9 дэх хэвлэлт)

KEYFITZ, Nathan. Introduction to the Mathematics of Population; 2nd Ed. Addison-Wesley, 1968.