Crispin, Frederic Swing
Bruce Pub. Co., 1961
Buku Referensi
Vira, Raghu
Secretary The International Academy of Indian Culture, 1950
Buku Referensi
Sybil P. Parker, editor in chief
McGraw-Hill, 1994
Buku Referensi
Sybil P. Parker, editor in chief
McGraw-Hill, 1984
Buku Referensi
Sybil P. Parker, editor in chief
McGraw-Hill, 1989
Buku Referensi