Gaya APA

Jean-Paul, S., Estella, B, H. (2010). Being And Nothingness : an essay on phenomenological ontology (Trawas) . London: Royal National Institute for the Blind.

Gaya MLA

Jean-Paul, Sartre., Estella, Barnes, Hazel. "Being And Nothingness : an essay on phenomenological ontology (Trawas)". London: Royal National Institute for the Blind, 2010. Text.