Gaya APA

Powerfull in educating. (). Hoboken, NJ: .

Gaya Chicago

Powerfull in educating. . Hoboken, NJ: , . Text.

Gaya MLA

Powerfull in educating. . Hoboken, NJ: , . Text.

Gaya Turabian

Powerfull in educating. Hoboken, NJ: , . Print.