APA

Gill A., Jamieson I., . (1969). Measurement of some surface properties of a few South African aggregates. Pretoria: National Institute for Road Res., Internal report nr RB/20/69.

Chicago

Gill A, Jamieson IL, . 1969. Measurement of some surface properties of a few South African aggregates. Pretoria: National Institute for Road Res., Internal report nr RB/20/69.

Harvard

Gill A., Jamieson I., . (1969). Measurement of some surface properties of a few South African aggregates. Pretoria: National Institute for Road Res., Internal report nr RB/20/69.

MLA

Gill A, Jamieson IL, . Measurement of some surface properties of a few South African aggregates. Pretoria: National Institute for Road Res., Internal report nr RB/20/69. 1969.