Johnson, W. B. (1973). Information, education and communication for population and family planning: A guide for national action. Community and Family Study Center, University of Chicago.
Dyfyniad Arddull ChicagoJohnson, W. Bert. Information, Education and Communication for Population and Family Planning: A Guide for National Action. Chicago: Community and Family Study Center, University of Chicago, 1973.
Dyfyniad MLAJohnson, W. Bert. Information, Education and Communication for Population and Family Planning: A Guide for National Action. Community and Family Study Center, University of Chicago, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.