APA-čujuhus (7. p.)
Wubbels, L. (1998). George Muller on faith: A 30 day devotional treasury. Emerald Book.
Chicago-čujuhus (17. p.)
Wubbels, Lance. George Muller on Faith: A 30 Day Devotional Treasury. Lynnwood, WA.: Emerald Book, 1998.
MLA-čujuhus (9. p.)
Wubbels, Lance. George Muller on Faith: A 30 Day Devotional Treasury. Emerald Book, 1998.
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