APA

Hardin J., Mack W., Still W. & Tracy N. (1976). Drilling and preparation of reusable, long range, horizontal bore holes in rock and in gouge. Waltham, MA: Foster-Miller Ass., Inc., Report nr HWA-7443 3.

Chicago

Hardin JC, Mack WM,Jr, Still WL and Tracy N. 1976. Drilling and preparation of reusable, long range, horizontal bore holes in rock and in gouge. Waltham, MA: Foster-Miller Ass., Inc., Report nr HWA-7443 3.

Harvard

Hardin J., Mack W., Still W. and Tracy N. (1976). Drilling and preparation of reusable, long range, horizontal bore holes in rock and in gouge. Waltham, MA: Foster-Miller Ass., Inc., Report nr HWA-7443 3.

MLA

Hardin JC, Mack WM,Jr, Still WL and Tracy N. Drilling and preparation of reusable, long range, horizontal bore holes in rock and in gouge. Waltham, MA: Foster-Miller Ass., Inc., Report nr HWA-7443 3. 1976.