Harahap, Krisna, author
Grafitri, 2006
Buku Teks
Harahap, Krisna, author
Grafitri, 2006
Buku Teks
Denny J.A., author
Jaya Baya University Press, 1999
Buku Teks
Afan Gaffar, author
Pustaka Pelajar, 1999
Buku Teks
Denny J.A., author
LKIS Yogyakarta, 2006
Buku Teks