MLA

Spencer, Barbara, Paul Deprez, and Derek Hum. Spectral Analysis and the Study of Seasonal Fluctuations In Historical Demography. Roma: s.n., 1976.

APA

Spencer, B., Deprez, P., & Hum, D. (1976). Spectral analysis and the study of seasonal fluctuations in historical demography. Roma: s.n.

Chicago

Spencer, Barbara, Paul Deprez, and Derek Hum. Spectral Analysis and the Study of Seasonal Fluctuations In Historical Demography. Roma: s.n., 1976.