Dyfyniad APA

Covey, S. R. (1999). The 7 habits of highly effective families. Simon and Schuster.

Dyfyniad Arddull Chicago

Covey, Stephen R. The 7 Habits of Highly Effective Families. UK: Simon and Schuster, 1999.

Dyfyniad MLA

Covey, Stephen R. The 7 Habits of Highly Effective Families. Simon and Schuster, 1999.

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