APA (7th ed.) Citation

Shiel, M. P. (1930). The purple cloud. The Vanguard press.

Chicago Style (17th ed.) Citation

Shiel, M. P. The Purple Cloud. New York: The Vanguard press, 1930.

MLA (9th ed.) Citation

Shiel, M. P. The Purple Cloud. The Vanguard press, 1930.

Warning: These citations may not always be 100% accurate.