Dyfyniad APA

Petrovskibi, A. (1984). Age-group and pedagogical psychology. Progress Publishers.

Dyfyniad Arddull Chicago

Petrovskibi, A.V. Age-group and Pedagogical Psychology. Moscow: Progress Publishers, 1984.

Dyfyniad MLA

Petrovskibi, A.V. Age-group and Pedagogical Psychology. Progress Publishers, 1984.

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