- Author: H. R. Maturana, F. J. Varela
- Language: English
- Year: 2012
- Author: Humberto R. Maturana, Francisco J. Varela
- Language: English
- Year: 2023
- Author: Humberto R. Maturana Francisco G. Varela
- Language: Turkish
- Year: 2010
- Author: Humberto Maturana & Francisco Varela
- Language: Spanish
- Year: 1972
- Author: Humberto R. Maturana Francisco J. Varela
- Language: Portuguese
- Year: 2001
- Author: Humberto R. Maturana Francisco J. Varela (auth.)
- Language: English
- Year: 1980
- Author: Humberto Maturana & Francisco Varela
- Language: Spanish
- Year: 1972
- Author: Humberto R. Maturana, Francisco J. Varela, Francisco Varela G.
- Language: Spanish
- Year: 2008
- Author: H.R. Maturana F.J. Varela
- Language: English
- Year: 1980
- Author: Humberto R. Maturana Francisco J. Varela
- Language: Italian
- Year: 1992