Cita APA (7th ed.)
Livingstone, I., & Ord, H. W. (1980). Economics for Eastern Africa. Heinemann.
Cita Chicago (17th ed.)
Livingstone, I., i H. W. Ord. Economics for Eastern Africa. Nairobi: Heinemann, 1980.
Cita MLA (9th ed.)
Livingstone, I., i H. W. Ord. Economics for Eastern Africa. Heinemann, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.