Cita APA (7th ed.)
Ole Kulet, H. R. (1971). Is it possible ?. Longman.
Cita Chicago (17th ed.)
Ole Kulet, Henry R. Is It Possible ?. Nairobi: Longman, 1971.
Cita MLA (9th ed.)
Ole Kulet, Henry R. Is It Possible ?. Longman, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.