Cita APA (7a ed.)

Open University, T. (1983). The markham colliery disaster - Case study 7a - 9a (1a ed.). Open University.

Cita Chicago Style (17a ed.)

Open University, The. The Markham Colliery Disaster - Case Study 7a - 9a. 1a ed. Wiltshire: Open University, 1983.

Cita MLA (9a ed.)

Open University, The. The Markham Colliery Disaster - Case Study 7a - 9a. 1a ed. Open University, 1983.