VanCleave, Janice Pratt
Pustaka Utama Grafiti, 1993
Buku Teks
Baker, Robert H.
D. Van Nostrand, 1964
Buku Teks
Morrison, David
Saunders College, 1990
Buku Teks
Chapman, Robert D.
W.H. Freeman, 1978
Buku Teks
Shaffer, Rick
Gramercy Books, 1994
Buku Referensi