Gaya APA

Merwe.J, N, V, D., Madden.Bernard.J, . (2010). second edition of Rock Engineering of Underground Coal Mining (E-Book) . Republic of South Africa: The Southern African Institute.

Gaya MLA

Merwe.J, Nielen, Van, Der., Madden.Bernard.J, . "second edition of Rock Engineering of Underground Coal Mining (E-Book)". Republic of South Africa: The Southern African Institute, 2010. E-book.