Vaškevičius 2016, p. 12. Vaškevičius, Algis (8 December 2016). "Paminėtas A. Šapokos "Lietuvos istorijos" 80-metis" [The 80th Anniversary of A. Šapoka's "History of Lithuania" Was Noted] (PDF). Draugas (in Lithuanian). Vol. CVl, no. 145. Chicago, Illinois. p. 12. Archived(PDF) from the original on 3 May 2023. Retrieved 3 May 2023.
Vaškevičius 2016, p. 12. Vaškevičius, Algis (8 December 2016). "Paminėtas A. Šapokos "Lietuvos istorijos" 80-metis" [The 80th Anniversary of A. Šapoka's "History of Lithuania" Was Noted] (PDF). Draugas (in Lithuanian). Vol. CVl, no. 145. Chicago, Illinois. p. 12. Archived(PDF) from the original on 3 May 2023. Retrieved 3 May 2023.