Hawking, S. (2013). Kalathinte akruthi. Progress publication.
Chicago Edition CitationHawking, Stephen. Kalathinte Akruthi. Kozhikode: Progress publication, 2013.
Cita MLAHawking, Stephen. Kalathinte Akruthi. Progress publication, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.