The Master Key System
Genres: parenting-relationships, self-help
Recordings
Narrated by Dan Strutzel
- Runtime: 7 h 59 min
- Publisher: Nightingale-Conant
- Released: 2021
- ASIN (us): B0924ZPD21
Narrated by Erik Synnestvedt
- Runtime: 6 h 53 min
- Publisher: Gildan Media, LLC
- Released: 2012
- ASIN (us): B007URXB3E
- 28 chapters
Narrated by James Boles
- Runtime: 7 h 6 min
- Publisher: Atria Books/Beyond Words
- Released: 2008
- ASIN (us): B002V5H03C
- 25 chapters
Narrated by Jason McCoy
- Runtime: 5 h 53 min
- Publisher: Big Happy Family, LLC
- Released: 2007
- ASIN (us): B002V1A3CQ
- 26 chapters