Alive: Letters 1934-1975, typescript, corrected (electrostatic copy)
MLA
Lowenfels, Walter, 1897-1976. Alive: Letters 1934-1975, typescript, corrected (electrostatic copy). Box 51, folder 983-988. circa 1975. https://collections.library.yale.edu/catalog/32248617.
APA, 6th edition
Lowenfels, Walter, 1897-1976. (["Box 51, folder 983-988"])(circa 1975)[Alive: Letters 1934-1975, typescript, corrected (electrostatic copy)]. https://collections.library.yale.edu/catalog/32248617.