Clarke, Arthur C.
VGSF , 1987
Buku Teks
Bernstein, Marver H.
Holt, Rinehart and Winston, 1960
Buku Teks
Kenneth Janda, Jeffrey M. Berry, Jerry Goldman, Deborah J. Schildkraut, Paul Manna
Cengage Learning, 2018
Buku Teks
by John G. Geer [and others]
Wadsworth and Cengage Learning, 2012
Buku Teks
Deva, B. C.
National Book Trust, 1977
Buku Teks