APA
Essa E., . (1999). A practical guide to solving preschool behavior problems 4th ed. [Place of publication not identified]: Delmar Publishing.
Chicago
Essa Eva, . 1999. A practical guide to solving preschool behavior problems 4th ed. [Place of publication not identified]: Delmar Publishing.
Harvard
Essa E., . (1999). A practical guide to solving preschool behavior problems 4th ed. [Place of publication not identified]: Delmar Publishing.
MLA
Essa Eva, . A practical guide to solving preschool behavior problems 4th ed. [Place of publication not identified]: Delmar Publishing. 1999.