Παραπομπή APA

Piaget, J. (1970). Main trends in inter-disciplinary research. Harper & Row.

Παραπομπή Chicago Style

Piaget, Jean. Main Trends in Inter-disciplinary Research. New York: Harper & Row, 1970.

Παραπομπή MLA

Piaget, Jean. Main Trends in Inter-disciplinary Research. Harper & Row, 1970.