| Sources |
- [S1443] _Births, Deaths and Marriages, Queensland, John Howard Alsop; Birth; Index; B14161; 1907; Brisbane.
- [S1429] Newspaper: Sydney Morning Herald (Sydney, NSW : 1842 - 1954) [TROVE], Death Notices; 17 Dec 1988.
- [S1447] _Births, Deaths and Marriages, NSW, John Howard Alsop; Death; Index; 30368; 1988; Lindfield.
- [S1443] _Births, Deaths and Marriages, Queensland, Osmond Howard Alsop + Muriel Lloyd Hart; Marriage; Index; C2377; 1906.
- [S1447] _Births, Deaths and Marriages, NSW, John Howard Alsop + Lilliam Mysie Isabel Chisholm; Marriage; Index; 4423; 1937; Woollahra.
- [S1395] Sydney, Australia, Anglican Parish Registers, 1814-2011 [A], Marriage; John Howard Alsop + Lillian Mysie Isabel Chisolm; 5 March 1937; Woollahra, All Saints; Page 113; No. 828; 15 June 2025.
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