edited by Martyn V. Twigg
Wolfe Publishing, 1989
Buku Referensi
edited by E.U. Condon and Hugh Odishaw
McGraw-Hill, 1967
Buku Referensi
Stiles, Karl A., author
McGraw-Hill, 1968
Buku Referensi
Skousen, Philip L., author
McGraw-Hill, 2011
Buku Teks
edited by E.U. Condon and Hugh Odishaw
McGraw-Hill, 1958
Buku Referensi