Cita APA (7th ed.)
Johnson, D. W., & Johnson, F. P. Joining Together: Group Theory and Group Skills. Prentice-Hall.
Cita Chicago (17th ed.)
Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. Englewood Cliffs, EUA: Prentice-Hall.
Cita MLA (9th ed.)
Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. Prentice-Hall.
Atenció: Aquestes cites poden no estar 100% correctes.