- Author: Unknown, Stanislav Grof, CHRISTINA GROF
- Language: English
- Year: 2010
- Author: STANISLAV GROF CHRISTINA GROF
- Language: Portuguese
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- Author: Stanislav Grof, Christina Grof
- Language: Spanish
- Year: 1990
- Author: Stanislav Grof Christina Grof Jack Kornfield
- Language: English
- Year: 2010
- Author: Stanislav Grof Christina Grof Jack Kornfield
- Language: English
- Year: 2010
- Author: Stanislav Grof Christina Grof Jack Kornfield
- Language: English
- Year: 2010
- Author: Stanislav Grof Christina Grof
- Language: English
- Year: 2010