Gaya APA

Al, K, K, E. (2011). TOWARDS A SEMIOTIC BIOLOGY: LIFE IS THE ACTION OF SIGNS . : CV. Spektra Anugerahabadi.

Gaya MLA

Al, Kull, Kalevi, Et. "TOWARDS A SEMIOTIC BIOLOGY: LIFE IS THE ACTION OF SIGNS". : CV. Spektra Anugerahabadi, 2011. Tadris Ilmu Pengetahuan Alam.