APA

Pickering G. W., . (1969). The challenge to education. Great Britain: Penguin Books.

Chicago

Pickering George White, . 1969. The challenge to education. Great Britain: Penguin Books.

Harvard

Pickering G. W., . (1969). The challenge to education. Great Britain: Penguin Books.

MLA

Pickering George White, . The challenge to education. Great Britain: Penguin Books. 1969.