Peters, Pam
Cambridge University Press, 1995
Buku Referensi
American Chemical Society, 1986
Buku Teks
American chemical Society , 1986
Buku Referensi
Strunk, William
Pearson Education, 2014
Buku Teks
general editor, Philip Rubens
Henry Holt and Company, 1992
Buku Referensi