APA (7e ed.) Bronvermelding

Barker, R., Mangahas, M. K., & Meyers, W. H. (1972). The probable impact of the seed-fertilizer revolution on grain production and on farm labor requirements. Institute of Economic Development and Research, School of Economics, University of the Philippines.

Chicago (17e ed.) Bronvermelding

Barker, Randolph, Mahar Kelly Mangahas, en William H. Meyers. The Probable Impact of the Seed-fertilizer Revolution on Grain Production and on Farm Labor Requirements. [Quezon City]: Institute of Economic Development and Research, School of Economics, University of the Philippines, 1972.

MLA (9e ed.) Bronvermelding

Barker, Randolph, et al. The Probable Impact of the Seed-fertilizer Revolution on Grain Production and on Farm Labor Requirements. Institute of Economic Development and Research, School of Economics, University of the Philippines, 1972.