Makarenko, A.S., author
Moscow Foreign Languages Publishing House 1953
Buku Teks
Freeborn, Richard
London : MacMillan Press, 1976
Buku Teks
Raghavan, V.
Prentice-Hall, 1981
Buku Teks
Raghavan, V.
Prentice Hall of India, 1996
Buku Teks
editors, Ann Curthoys, A.W. Martin, Tim Rowse
Fairfax, Syme & Weldon Associates, 1987
Buku Referensi