APA

Dorland G. N., Van Der Wal J., . (1978). The business idea: from birth to profitable company. New York: Van Nostrand Reinhold.

Chicago

Dorland Gilbert N, Van Der Wal John, . 1978. The business idea: from birth to profitable company. New York: Van Nostrand Reinhold.

Harvard

Dorland G. N., Van Der Wal J., . (1978). The business idea: from birth to profitable company. New York: Van Nostrand Reinhold.

MLA

Dorland Gilbert N, Van Der Wal John, . The business idea: from birth to profitable company. New York: Van Nostrand Reinhold. 1978.