Sandage, C.H.
Richard D. Irwin, 1961
Buku Teks
Ahmed, Akbar S., author
Routledge, 1995
Buku Teks
Huntington, Samuel P., author
The Belknap Press, 1981
Buku Teks
Ahmed, Akbar S., author
Routledge , 1992
Buku Teks
Rogers, Robert W. ,author
DDI Press, 2011
Buku Teks