APA

Thoreau H. D., . (1992). Walden. London: David Campbell Publishers Ltd.

Chicago

Thoreau H D, . 1992. Walden. London: David Campbell Publishers Ltd.

Harvard

Thoreau H. D., . (1992). Walden. London: David Campbell Publishers Ltd.

MLA

Thoreau H D, . Walden. London: David Campbell Publishers Ltd. 1992.