APA

Hesler L. R., Smith A. H., . (1963). North American species of Hygrophorus. Knoxville: University of Tennessee Press.

Chicago

Hesler L R, Smith Alexander H, . 1963. North American species of Hygrophorus. Knoxville: University of Tennessee Press.

Harvard

Hesler L. R., Smith A. H., . (1963). North American species of Hygrophorus. Knoxville: University of Tennessee Press.

MLA

Hesler L R, Smith Alexander H, . North American species of Hygrophorus. Knoxville: University of Tennessee Press. 1963.