APA (7th ed.) Citation

Graber, R. R., & Graber, J. W. (1963). A comparative study of bird populations in Illinois, 1906-1909 and 1956-1958. [publisher not identified].

Chicago Style (17th ed.) Citation

Graber, Richard Rex, and Jean Weber Graber. A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958. Urbana: [publisher not identified], 1963.

MLA (9th ed.) Citation

Graber, Richard Rex, and Jean Weber Graber. A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958. [publisher not identified], 1963.