Dyfyniad APA
Feldman, R. S. (2018). Development across the life span (8th ed.). Pearson.
Dyfyniad Arddull Chicago
Feldman, Robert S. Development Across the Life Span. 8th ed. Harlow, England: Pearson, 2018.
Dyfyniad MLA
Feldman, Robert S. Development Across the Life Span. 8th ed. Pearson, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.