Aboyade, Ojetunji
Foundations of an African economy : a study of investment and growth in Nigeria
Praeger, 1966
 Buku Teks
Kane, Robert S.
Canada A to Z / Robert S. Kane
Doubleday & Company, 1964
 Buku Teks SO
John, Robert St
Israel / Robert St. John
Time Incorporated, 1962
 Buku Teks
Payne, Robert
Journey to red China / Robert Payne
William Heinemann, 1947
 Buku Teks
An analysis of intra-urban homeownership rates in an African City : the case of Ibadan, Nigeria
 Artikel Jurnal