APA

Penner E., Ueda T., . (1978). Soil frost-susceptibility test and a basis for interpreting heaving rates (Permafrost. 3. Intern. Conf. s 721-7). Ottawa: National Research Council Canada. Division of building research. DBR paper 814.

Chicago

Penner E, Ueda T, . 1978. Soil frost-susceptibility test and a basis for interpreting heaving rates (Permafrost. 3. Intern. Conf. s 721-7). Ottawa: National Research Council Canada. Division of building research. DBR paper 814.

Harvard

Penner E., Ueda T., . (1978). Soil frost-susceptibility test and a basis for interpreting heaving rates (Permafrost. 3. Intern. Conf. s 721-7). Ottawa: National Research Council Canada. Division of building research. DBR paper 814.

MLA

Penner E, Ueda T, . Soil frost-susceptibility test and a basis for interpreting heaving rates (Permafrost. 3. Intern. Conf. s 721-7). Ottawa: National Research Council Canada. Division of building research. DBR paper 814. 1978.