Ayer, Alfred Jules, 1910-1989
Language, truth and logic
Dover, 1952
 Buku Teks
Cassirer, Ernst
Philosophie der symbolischen Formen
B. Cassirer, 1923-29
 Buku Teks
Questioning foundations: truth/subjectivity/culture/Edited by Hugh J. Silverman;
Routledge, 1993
 Buku Teks
Pike, Kenneth L. (Kenneth Lee), 1912-2000
Talk, thought, and thing : the emic road toward conscious knowledge
Summer Institute of Linguistics , 1993
 Buku Teks
Grayling, A. C.
An introduction to philosophical logic / A.C. Grayling
Blackwell Publishers, 1997
 Buku Teks