APA (7th ed.) Citation

Langville, A. R. (1979). Modern world rulers: A chronology. Scarecrow Press.

Chicago Style (17th ed.) Citation

Langville, Alan R. Modern World Rulers: A Chronology. Metuchen, N.J.: Scarecrow Press, 1979.

MLA (9th ed.) Citation

Langville, Alan R. Modern World Rulers: A Chronology. Scarecrow Press, 1979.