APA (7th ed.) Citation

Williamson, G. I. (1993). The Heidelberg catechism: A study guide. P&R Pub.

Chicago Style (17th ed.) Citation

Williamson, G. I. The Heidelberg Catechism: A Study Guide. Phillipsburg, N.J: P&R Pub, 1993.

MLA (9th ed.) Citation

Williamson, G. I. The Heidelberg Catechism: A Study Guide. P&R Pub, 1993.

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