| Data | source |
|---|---|
| teacher trainer at University of London Institute of Education; chief examiner for RSA Cert in ESL in primary and secondary schools;taught in Africa; researcher in Educational television in Zaire and Zambia; | Holden, Susan, 1979 |
| Cripwell, Kenneth (1979). A question of pace. in Holden, Susan. Teacher Training. : Modern English Publications, pp.47-50 |