Gaya APA

Sill, W, B. (1968). The New Populer Science Ekcyclopedia of the Sciences (-). -: Maryland, Ottenveimer.Inc.

Gaya MLA

Sill, William, B. "The New Populer Science Ekcyclopedia of the Sciences". - -: Maryland, Ottenveimer.Inc, 1968. Universitas.