APA (7th ed.) Citation

Sijpesteijn, P. J. (1989). Remarks on Some Magical Gems.

Chicago Style (17th ed.) Citation

Sijpesteijn, Pieter J. Remarks on Some Magical Gems. 1989.

MLA (9th ed.) Citation

Sijpesteijn, Pieter J. Remarks on Some Magical Gems. 1989.

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