Beckman, Harry, author
W.B. Saunders, 1952
Buku Referensi
edited by Ronald H. Girdwood
Bailliere Tindall, 1976
Buku Teks
McGraw-Hill International Book Company, 1982
Buku Teks
edited by John A. Bevan
Harper & Row, 1976
Buku Teks
Beckman, Harry, author
W.B. Saunders, 1961
Buku Teks