APA (7th ed.) Citation

Ong, W. J. (1952). Heidelberg Castle in Heidelberg, Germany.

Chicago Style (17th ed.) Citation

Ong, Walter J. Heidelberg Castle in Heidelberg, Germany. 1952.

MLA (8th ed.) Citation

Ong, Walter J. Heidelberg Castle in Heidelberg, Germany. 1952.

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