Sage, A., & Zug, M. (2007). Septimus heap book 3: Physik (Book 3.). Harper Collins Publishers.
Chicago Style (17th ed.) CitationSage, Angie, and Mark Zug. Septimus Heap Book 3: Physik. Book 3. New York: Harper Collins Publishers, 2007.
MLA (9th ed.) CitationSage, Angie, and Mark Zug. Septimus Heap Book 3: Physik. Book 3. Harper Collins Publishers, 2007.
Warning: These citations may not always be 100% accurate.