Cita APA

Spengler, J. J. 1., Smith, R. S. 1., De Vyver, F. T. 1., & Allen, W. R. (1972). Population economics: Selected essays of Joseph J. Spengler. Durham, North Carolina: Duke University Press.

Citación estilo Chicago

Spengler, Joseph John 1902-, Robert Sidney 1904-1969 Smith, Frank Traver 1904-1980 De Vyver, y William R. Allen. Population Economics: Selected Essays of Joseph J. Spengler. Durham, North Carolina: Duke University Press, 1972.

Cita MLA

Spengler, Joseph John 1902-, Robert Sidney 1904-1969 Smith, Frank Traver 1904-1980 De Vyver, y William R. Allen. Population Economics: Selected Essays of Joseph J. Spengler. Durham, North Carolina: Duke University Press, 1972.