Organizer. Tumbler Memo Book. U.S.A., 1939.
Because there were no other ways to cite this, I invented a new format. I put the author as the “Organizer” because I didn’t know if the owner was a guy or a girl. “Tumbler Memo Book” is the title I put because that’s the title on the cover page. Lastly, it was made in U.S.A. and the reason why I put 1939 as the year is because the Organizer started using this memo book in the beginning of school year in 1939.