Gaya APA

Marulafau, S. (2002). The influence of existential Philosophers to some of American Writers in the 20th Century (Vol. 2, No. 1/ April 2002). Medan: Fakultas Sastra Universitas Islam Sumatera Utara.

Gaya MLA

Marulafau, Siamir. "The influence of existential Philosophers to some of American Writers in the 20th Century". Vol. 2, No. 1/ April 2002 Medan: Fakultas Sastra Universitas Islam Sumatera Utara, 2002. Art Original.