New horizons world guide
edited by Gerald W. Whitted
Pan American World Airways, 1963
 Buku Referensi
New horizons world guide : Pan American's Travel Facts about 108 countries
edited by Gerald W. Whitted
Pan American Airways, 1963
 Buku Teks SO
New horizons world guide : Pan Am's Travel Facts about 138 countries
edited by Gerald W. Whitted
Pan American World Airways, 1971
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Barnes, Harry Elmer
New horizons in criminology
Prentice Hall of India, 1966
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New Horizons in Linguistics
edited by John Lyons
Penguin Books, 1973
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