Template:Who's Who

• surname
• othernames
• id (from the URL)
• type (for any Who Was Who volume, use "was")
• volume (e.g. 2024 – without "Who's Who" or "Who Was Who")
• edition (omit the word edition)
• accessed

e.g. {{Who's Who | surname = Hayward | othernames = Henry Rudge | id = U186956 | type = was | volume = 1920–2016 | edition = April 2014 online | accessed = Template:Date }}

looks like

Hayward, Henry Rudge. Who Was Who. 1920–2016 (April 2014 online ed.). A & C Black, an imprint of Bloomsbury Publishing plc. http://www.ukwhoswho.com/view/article/oupww/whowaswho/U186956. Retrieved Template:Date.