Gaya APA

Graph & Disgraph 3rd ed. (511). : 422.

Gaya Chicago

Graph & Disgraph 3rd ed. Chapman. : 422, 511. Chartrand G.

Gaya MLA

Graph & Disgraph 3rd ed. Chapman. : 422, 511. Chartrand G.

Gaya Turabian

Graph & Disgraph 3rd ed. : 422, 511. Chartrand G.