Dyfyniad APA

Hurlock, E. B. (1980). Development psychology: Alife-span approach (5th. ed.). Mc Graw Hill.

Dyfyniad Arddull Chicago

Hurlock, Elizabeth B. Development Psychology: Alife-span Approach. 5th. ed. Mc Graw Hill, 1980.

Dyfyniad MLA

Hurlock, Elizabeth B. Development Psychology: Alife-span Approach. 5th. ed. Mc Graw Hill, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.