Book  (19 Apr 2000)  Page(s) 125.  
 
'DICroyal0, HT, ab, 1992; (Princess Royal); description; (Tequila Sunrise X Unnamed seedling); Dickson, Colin; Dickson Nurseries, Ltd.

Book  (Dec 1998)  Page(s) 486.  
 
Princess Royal (DICroyal) Large-flowered/Hybrid Tea. Dickson (UK) 1992. Description... apricot-colored...

Book  (1996)  Page(s) 67.  
 
Princess Royal (DICroyal) Large-flowered (Hybrid Tea) bush. Description. Flowers: golden apricot. Parentage: 'Tequila Sunrise' x Seedling. Dickson (N. Ireland) 1992. Chosen by HRH in aid of Riding for the Disabled.

Book  (Apr 1993)  Page(s) 472.  
 
Princess Royal Hybrid Tea, apricot, 1992, (DICroyal); 'Tequila Sunrise' x Seedling; Dickosn, Colin. Description.