Format: in text citation
The director's concept was built over a period of 3 years (Surname of author of programme if known, Year, page).
Author of programme surname, initials. (Year) Title of event. Performance venue, location, date of performance [Event programme].
Example: in text citation
The director's concept was built over a period of 3 years (Kirkwood, 2019, p.5).
Kirkwood, C. (2019) Opt Out. Royal Theatre, Northampton, 9th March 2019 [Event programme].
Note: if author of programme is not known, use company or director’s name instead.