Heinlein, R. A. (2025, April 4). Robert A. Heinlein quote. Quotesia. Retrieved from https://quotesia.com/robert-a-heinlein-quote/612684
Heinlein, Robert A.. “Robert A. Heinlein quote”. Quotesia. 4 Apr. 2025: https://quotesia.com/robert-a-heinlein-quote/612684.
Heinlein, R. A. (2025). Quotesia [Online]. Available at: https://quotesia.com/robert-a-heinlein-quote/612684 (Accessed: April 4 2025).
Heinlein, Robert A.. “Robert A. Heinlein quote” Quotesia. https://quotesia.com/robert-a-heinlein-quote/612684 (accessed April 4, 2025).
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