Black, James Menzies
Prentica-Hall , 1957
Buku Teks
Hill, Napoleon
Gramedia Pustaka Utama, 2024
Buku Teks SO
Thomas, Ian
Brockhamton Press, 1999
Buku Teks SO
Katouh, Zoulfa
Little, Brown and Company, 2023
Buku Teks SO
Brown, Christy
Secker & Warburg, 1976
Buku Teks SO