Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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