Gemignani, Michael C., author
Addison-Wesley, 1968
Buku Teks
edited by Jon Barwise; with the cooperation, H.J. Keisler, K. Kunen, Y. N. Moschowakis, A.S. Trioelstra
North-Holland Pub. Co, 1978
Buku Referensi
Ben-Ari, Mordechai, author
Springer, 2012
eBooks
Langer, Susanne, author
Dover, 1967
Buku Teks
Standley, Gerald B., author
Houghton Mifflin, 1971
Buku Teks