APA (7th ed.) Citation

Spengler, J. J. (1975). Zero population growth: Implications. Carolina Population Center. University of North Carolina at Chapel Hill.

Chicago Style (17th ed.) Citation

Spengler, Joseph John. Zero Population Growth: Implications. Chapel Hill: Carolina Population Center. University of North Carolina at Chapel Hill, 1975.

MLA (9th ed.) Citation

Spengler, Joseph John. Zero Population Growth: Implications. Carolina Population Center. University of North Carolina at Chapel Hill, 1975.