APA (7th ed.) Citation

Sutton, M. L. (2014). Heaven opens: The trinitarian mysticism of Adrienne von Speyr. Fortress Press.

Chicago Style (17th ed.) Citation

Sutton, Matthew Lewis. Heaven Opens: The Trinitarian Mysticism of Adrienne Von Speyr. Minneapolis: Fortress Press, 2014.

MLA (8th ed.) Citation

Sutton, Matthew Lewis. Heaven Opens: The Trinitarian Mysticism of Adrienne Von Speyr. Fortress Press, 2014.

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