Peremitin D. V. & Vorobyeva V. V. Viktoriya Vladimirovna. (2016). The origin of the expression “once in a blue moon”. Can the moon really be blue? 2016.
Chicago Style (17th ed.) CitationPeremitin D. V. and Vorobyeva V. V. Viktoriya Vladimirovna. The Origin of the Expression “once in a Blue Moon”. Can the Moon Really Be Blue? 2016, 2016.
MLA (9th ed.) CitationPeremitin D. V. and Vorobyeva V. V. Viktoriya Vladimirovna. The Origin of the Expression “once in a Blue Moon”. Can the Moon Really Be Blue? 2016, 2016.
Warning: These citations may not always be 100% accurate.