Dyfyniad APA
Johnson, D. W., & Johnson, F. P. (1994). Joining together: Group theory and group skills (5th ed.). Prentice-Hall.
Dyfyniad Arddull Chicago
Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 5th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1994.
Dyfyniad MLA
Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 5th ed. Prentice-Hall, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.