Gaya APA

S.Eckaus, R. (1977). Appropriate Techhnologies For Developing Countries (Ed. 1). Washington, D.C.: National Academy Of Sciencees.

Gaya MLA

S.Eckaus, Richard. "Appropriate Techhnologies For Developing Countries". Ed. 1 Washington, D.C.: National Academy Of Sciencees, 1977. Text.