APA (7e ed.) Bronvermelding

Goonetilleke, H. (1974). Pretest of selected symbols for use as a national symbol for family planning. Family Planning Communication Strategy Project.

Chicago (17e ed.) Bronvermelding

Goonetilleke, H.M. Pretest of Selected Symbols for Use as a National Symbol for Family Planning. Colombo, Sri Lanka: Family Planning Communication Strategy Project, 1974.

MLA (9e ed.) Bronvermelding

Goonetilleke, H.M. Pretest of Selected Symbols for Use as a National Symbol for Family Planning. Family Planning Communication Strategy Project, 1974.